Mechanical reducer

Mechanical reducer comprising a driving member and a driven member revolving at different angular speeds depending from the reduction ratio of the reducer, comprising two reduction members, coaxial with the driving and the driven members, angularly displaceable the one with respect to the other, each comprising a series of driving elements uniformly distributed and concentric with the corresponding reduction members, the two said series having different numbers of driving elements;

• at least one eccentric rotor driven by at least one eccentric fast with the driving member;
• said rotor comprising at least three pairs of actuating members uniformly distributed around its center and each actuating member of a pair being located in one of two circles having two different diameters and concentric to said rotor, the actuating members of each said pair being radially aligned with respect to the center of the rotor, the number of said actuating members of the rotor located on each of said circles being equal, one of the actuating members of each said pair cooperating with the driving elements of one of the reduction members, the other actuating member of each pair cooperating with the driving elements of the other reduction member;
• the diameter of the outermost circle of the actuating members being less than the diameters of the circles on which the driving elements of both reduction members are located, so that during one revolution of the rotor the outer actuating member of each pair of actuating members is retracted inside of said smaller diameter circle on which driving elements are located.